ub: uburma add uobj init and exit process in uburma open and close

driver inclusion
category: feature
bugzilla: NA
CVE: NA

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Add uobj init and exit function which will be used in uburma open and close
process to init and uninit uobj list.
Add uobj macro declare_uobj_class() which will be used when we want to
create a new type of uobj class.

Signed-off-by: Guoxin Qian <qianguoxin@huawei.com>
Signed-off-by: Yizhen Fan <fanyizhen@huawei.com>